For Jose Vital, the chair of Harper College’s HVACR program in Palatine, Illinois, the coronavirus pandemic illustrates two absolutes in the HVACR field: It’s essential, and it’s ever-changing.

For HVACR contractors and technicians, having the right tools on a service call can make all the difference. But are all tools treated equally or are some disregarded? At this year’s AHR Expo in ...